Mark Harris, LCSW
NPI 1083217061 · Clinical Social Worker · Chicago, IL
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Harris, LCSW is a Clinical Social Worker provider in Chicago, IL (NPI 1083217061).
Provider details
- NPI number
- 1083217061
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 149026521 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-11-20
- Last updated
- 2025-01-06
- Certified
- 2025-01-06
Frequently asked questions
- What is Mark Harris's NPI number?
- Mark Harris's National Provider Identifier (NPI) is 1083217061, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Harris's specialty?
- Mark Harris is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Harris located?
- Mark Harris's practice location on file with NPPES is 645 S Central Ave, Chicago, IL 60644-5059.
- What is Mark Harris's phone number?
- The practice phone number listed in the NPPES registry for Mark Harris is (773) 854-5820.
- Does Mark Harris accept Medicare?
- Mark Harris is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Harris's NPI active?
- Yes — Mark Harris's NPI (1083217061) is active in the NPPES registry as of the last update on 2025-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.